<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <style>
    #container {
      position: relative;
      width: 400px;
      height: 100px;
      border: 1px solid  black;
    }

    .box {
      position: absolute;
      width: 100px;
      height: 100px;
      background-color: green;

      left: 150px;
    }
   </style>
</head>
<body>

  <div id="container">
    <div class="box"></div>
  </div>

</body>
</html>
